forwarder selection logic by bind9

[Steven Carr]

On Sat, 10 Nov 2018 at 15:00, József Lázár <jozsef.gabor.lazar at gmail.com> wrote:
> I'm wondering what the selection logic in bind for forwarders. I tried to look for this information in the official documentation but couldn't find it. Could you please describe it for me briefly?

SRTT (smoothed round trip time), same mechanism BIND uses to query NS
records in a zone.